Search found 628 matches

by XavSnap
Fri Jul 19, 2019 2:10 am
Forum: ZX Spectrum Lounge
Topic: X and Y
Replies: 13
Views: 944

Re: X and Y

Thanks 2Late.
:ugeek:
by XavSnap
Thu Jul 18, 2019 5:37 pm
Forum: Development
Topic: Error which can not possibly exist in z80asm Version 1.8
Replies: 7
Views: 144

Re: Error which can not possibly exist in z80asm Version 1.8

:lol: Yes, "OCR" vs "glasses & old eyes" ! OCR win… Seriously, I'm tired of looking for the little fuctions on the ZX81 or Spectum keyboard ! INK, PAPER… 3 keys to change the color in Basic … Just use "J",shift+"P",shift+"P" & "R". All programs in a text mode, on a pretty "word-pad"... (Xur,ZxToken....
by XavSnap
Wed Jul 17, 2019 10:12 pm
Forum: Hardware
Topic: French FrankenZX81, unique?
Replies: 26
Views: 992

Re: French FrankenZX81, unique?

9924 : Hex. editor
10165 : FLM menu.

But, the code had to be move up the ram_top set @ $C000.( Lb2BD0)
And all calls are decayed.
by XavSnap
Wed Jul 17, 2019 6:15 pm
Forum: Hardware
Topic: French FrankenZX81, unique?
Replies: 26
Views: 992

Re: French FrankenZX81, unique?

I saw a menu in the ROM listing, can I call that up with a RAND USR too?
I tried to get the menu too, but the main code is located in the ROM, and isn't move up the RAM_TOP.

All calls used with the tape FLM version are moved to the low memory ROM...
by XavSnap
Wed Jul 17, 2019 6:00 pm
Forum: Development
Topic: Error which can not possibly exist in z80asm Version 1.8
Replies: 7
Views: 144

Re: Error which can not possibly exist in z80asm Version 1.8

which has characters which look like i or y in the terminal, but have different code-points. Yes… Or it's an OCR issus… "0"="o"... "I"="1" or "L"... Or it's the Spectrum ASCII page code, were any codes like "£" are at the wrong place in the IBM ASCII table. Spectrum Ascii table: 1.JPG IBM Ascii tab...
by XavSnap
Wed Jul 17, 2019 3:13 am
Forum: Development
Topic: Error which can not possibly exist in z80asm Version 1.8
Replies: 7
Views: 144

Re: Error which can not possibly exist in z80asm Version 1.8

Hi 2late, Sorry for my answer which will be useless with regard to your psedo … shift.zas:1386: error: unable to resolve reference: iy Nerver set a label : "A:","SP:", "HL:","BC" … in your code. The lower/hupper case may give a wrong label jump. jrz r,iy It's a relative jump used to jump in -126 to ...
by XavSnap
Thu Jul 11, 2019 11:06 am
Forum: Hardware
Topic: Using a Kempston Joystick Interface with a ZX81
Replies: 3
Views: 179

Re: Using a Kempston Joystick Interface with a ZX81

And, the full duplex release… JOY2.P Based a an array J() 1 to 5, set to "0" (false) or "1" (true) : 0 REM [HEX:\ DB,1F,2A,12,40,23,01,00,\ 05,CB,47,36,00,28,02,36,\ 81,1F,23,23,23,23,23,10,\ F0,CD,5B ] 0 DIM J(5) 5 LET J(1)=USR VAL "16514" 20 PRINT AT 5,5;" ";AT 5,5;("RIGHT " AND J(1));("LEFT " AND...
by XavSnap
Thu Jul 11, 2019 1:59 am
Forum: Hardware
Topic: Using a Kempston Joystick Interface with a ZX81
Replies: 3
Views: 179

Re: Using a Kempston Joystick Interface with a ZX81

Hi Mark, Can you test or check this routine, EO & Xur can't simulate it… TEST.P Thanks. Note: ( 0=0; 1=1; 2=2; 4=3; 8=4)= Bit range… In this decoder, the ASM routine can't test UP&RIGHT, LEFT&DOWN... multi-states joystick commands! :shock: You can't press 'fire' while using another direction. But, w...
by XavSnap
Mon Jul 08, 2019 10:29 pm
Forum: ZX BASIC
Topic: [TUTORIAL] How to disassemble ASM in VB81 XuR ?
Replies: 0
Views: 205

[TUTORIAL] How to disassemble ASM in VB81 XuR ?

Hi everybody, Before disassembling, keep in mind that there may be several types of information in a Z80 assembler program. Program mnemonics, consisting of a series of processor-specific byte codes, jump, address, and data information related to the called functions. A byte (or more) needle to a s...